Recursion Warm Up

linkedList.js

function Node(data) {
    this.data = data;
    this.next = null;
}
 
function LinkedList() {
    this.length = 0;
    this.head = null;
}
 
LinkedList.prototype.add = function(value) {
    var node = new Node(value);
    var currentNode = this.head;
    this.length++;

    if (!currentNode) {
        this.head = node;
        return
    }
    
    // TODO change while loop to recursion
    while (currentNode.next) {
        currentNode = currentNode.next;
    }
 
    currentNode.next = node;
};